Bigbruin.com has posted a review on the Cooler Master Z600 and Sphere CPU Coolers

Everything is big with the Z600.... The height, width, weight, heatpipes, and even the thickness of the fins. It is capable of providing incredible cooling results when used with either one or two low speed 120mm fans. Adding higher speed fans might create some extra noise to live with, but I can imagine that the temperatures could be ridiculously low.

Cooler Master Z600 and Sphere CPU Coolers Review